On Fri, Feb 28, 2025 at 09:16 PM, Peter E wrote:
does not show any evidence of this happening
That's simply? because there is no phase locked carrier insertion oscillator in Am mode? , the detector carrier is derived from the clipped off-air signal. if the carrier fades out, then Thers nothing to re-inject , as the? tune passes over the signal, the carrier / side band relationship ,remains unaffected.?
?
The RA1771&2 , 1778 have carrier locked AFC , again if the carrier drops then the? Afc holds the? last good lock frequency?
the afc enters at the? 34 M osc to alter set tune, not linked to the? detector[s]?
?
This and ssb/isb enables better recovery of? AM , but, thats using the? internal phase locked CIO and the? filters to
present the? detector with usb/lsb signal ,?
?
Anything on from this, need to add DSP , something like RTL dongle in direct sample mode and sdr-sharp or other ,
looking at the 455K IF out [or 1.4 MHz ra 1778] , various 'locked'? detector modes are then available ...?
?
73 Graham
g0nbd?
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